Added mailboxes as local data sources (#1022)

app/Tests/Tools/Mail/MailServerHostsTests.cs

@@ -0,0 +1,36 @@
+using AIStudio.Tools.Mail;
+
+namespace AIStudio.Tests.Tools.Mail;
+
+/// <summary>
+/// Checks when two hosts count as the same mail server.
+/// </summary>
+/// <remarks>
+/// The mailbox dialog recognizes a mail server of the organization by its host, and an
+/// organization which allows only its own mail servers decides by it whether AI Studio may connect.
+/// A host written another way must not look like a different server, and a different server must
+/// never pass for one of the organization.
+/// </remarks>
+[TestFixture]
+public sealed class MailServerHostsTests
+{
+    [TestCase("imap.example.org", "imap.example.org")]
+    [TestCase("imap.example.org", "IMAP.Example.ORG")]
+    [TestCase("imap.example.org", " imap.example.org ")]
+    [TestCase("imap.example.org", "imap.example.org.")]
+    [TestCase("imap.müller.example", "imap.xn--mller-kva.example")]
+    [TestCase("192.0.2.10", "192.0.2.10")]
+    public void HostsWrittenDifferentlyNameTheSameServer(string host, string otherHost) => Assert.That(MailServerHosts.AreSame(host, otherHost), Is.True);
+
+    [TestCase("imap.example.org", "imap.example.com")]
+    [TestCase("imap.example.org", "mail.imap.example.org")]
+    [TestCase("imap.example.org", "imap.example.org.evil.example")]
+    [TestCase("imap.mueller.example", "imap.müller.example")]
+    [TestCase("192.0.2.10", "192.0.2.11")]
+    public void DifferentServersStayDifferent(string host, string otherHost) => Assert.That(MailServerHosts.AreSame(host, otherHost), Is.False);
+
+    [TestCase("", "")]
+    [TestCase("imaps://imap.example.org", "imaps://imap.example.org")]
+    [TestCase("imap.example.org:993", "imap.example.org:993")]
+    public void WhatIsNoHostIsNoServer(string host, string otherHost) => Assert.That(MailServerHosts.AreSame(host, otherHost), Is.False, "Two equal texts which are no hosts must not count as a match, or an empty host would match an empty one.");
+}